Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
28 Minutes Later ( 20 points )	Complete Zombies Story mode.
Addicted ( 30 points )	Win 20 Ranked Matches.
Ball Hugger ( 30 points )	Catch 20 balls in Ranked Matches.
Chuck rules! ( 15 points )	Complete Ninjas Story mode.
Dish Best Served Cold ( 5 points )	Successfully counter a shot in Story mode.
First! ( 5 points )	Win a match in Story mode.
Just Getting Started ( 10 points )	Win a Ranked Match.
Neo ( 5 points )	Dodge a powershot in Story mode.
Plunder that Booty ( 15 points )	Complete Pirates Story mode.
Reboot ( 25 points )	Complete Robots Story mode.
There's Always a Catch ( 5 points )	Catch a ball in Story mode.
Untouchable ( 35 points )	Counter 30 shots in Ranked Matches.